Massive/EditSet.tsx

import React, {useEffect, useRef, useState} from 'react';
import {StyleSheet, Text, View} from 'react-native';
import {Button, Modal, Portal, TextInput} from 'react-native-paper';
import {getDb} from './db';
import Set from './set';
import {format} from 'date-fns';

export default function EditSet({
  id,
  onSave,
  show,
  setShow,
  clearId,
}: {
  id?: number;
  clearId: () => void;
  onSave: () => void;
  show: boolean;
  setShow: (visible: boolean) => void;
}) {
  const [name, setName] = useState('');
  const [reps, setReps] = useState('');
  const [weight, setWeight] = useState('');
  const [unit, setUnit] = useState('');
  const [created, setCreated] = useState(new Date(new Date().toUTCString()));
  const weightRef = useRef<any>(null);
  const repsRef = useRef<any>(null);
  const unitRef = useRef<any>(null);

  useEffect(() => {
    if (!id) return setCreated(new Date(new Date().toUTCString()));
    getDb().then(async db => {
      const [result] = await db.executeSql(`SELECT * FROM sets WHERE id = ?`, [
        id,
      ]);
      if (!result.rows.item(0)) throw new Error("Can't find specified Set.");
      const set: Set = result.rows.item(0);
      setName(set.name);
      setReps(set.reps.toString());
      setWeight(set.weight.toString());
      setUnit(set.unit);
      setCreated(new Date(set.created));
    });
  }, [id]);

  const save = async () => {
    if (!name || !reps || !weight) return;
    const db = await getDb();
    if (!id)
      await db.executeSql(
        `INSERT INTO sets(name, reps, weight, created, unit) VALUES (?,?,?,?,?)`,
        [name, reps, weight, new Date().toISOString(), unit || 'kg'],
      );
    else
      await db.executeSql(
        `UPDATE sets SET name = ?, reps = ?, weight = ?, unit = ? WHERE id = ?`,
        [name, reps, weight, unit, id],
      );
    setShow(false);
    onSave();
  };

  return (
    <Portal>
      <Modal
        visible={show}
        contentContainerStyle={styles.modal}
        onDismiss={() => setShow(false)}>
        <Text style={styles.title}>{id ? `Edit "${name}"` : 'Add a set'}</Text>
        <TextInput
          style={styles.text}
          autoFocus
          label="Name *"
          value={name}
          onChangeText={setName}
          onSubmitEditing={() => repsRef.current?.focus()}
        />
        <TextInput
          style={styles.text}
          label="Reps *"
          keyboardType="numeric"
          value={reps}
          onChangeText={setReps}
          ref={repsRef}
          onSubmitEditing={() => weightRef.current?.focus()}
        />
        <TextInput
          style={styles.text}
          label="Weight *"
          keyboardType="numeric"
          value={weight}
          onChangeText={setWeight}
          onSubmitEditing={save}
          ref={weightRef}
        />
        <TextInput
          style={styles.text}
          label="Unit (kg)"
          value={unit}
          onChangeText={setUnit}
          ref={unitRef}
          onSubmitEditing={save}
        />
        <Text style={styles.text}>{format(created, 'PPPP p')}</Text>
        <View style={styles.bottom}>
          <Button mode="contained" icon="save" onPress={save}>
            Save
          </Button>
          <Button icon="close" onPress={() => setShow(false)}>
            Cancel
          </Button>
          {id && (
            <Button icon="copy" onPress={clearId}>
              Duplicate
            </Button>
          )}
        </View>
      </Modal>
    </Portal>
  );
}

const styles = StyleSheet.create({
  modal: {
    backgroundColor: 'black',
    padding: 20,
  },
  text: {
    marginBottom: 10,
  },
  bottom: {
    flexDirection: 'row',
  },
  title: {
    fontSize: 20,
    marginBottom: 10,
  },
});